MacBain's Dictionary - Section 13

a nettle, Irish neantóg,
Middle Irish nenntóg,
Early Irish nenaid,
*nenadi-, for *ne-nadi, a reduplicated form; Anglo-Saxon netele,
English nettle; Lithuanian néndre@?, pipe, tube. The t of Gaelic and Irish is
due to the same phonetic law that gives
teine the pl. teintean.

poor, wretched, Irish dearóil,
Early Irish deróil, feeble,
Old Irish
deróil, penuria, from der-, privative prefix
(see deàrgnaidh),
and óil, abundance,
which Windisch has referred to *pâli-, a
form of the root pl@., pel, full, as in lán.

the palm of the hand, Irish déarna,
Early Irish derna; cf. Greek
@Gdw@nron, palm, handbreadth,
@Gdáris, the distance between the
thumb and little finger, a span (Hes.),
@Gdarei@`r, the distance
between the big and little fingers (Hes.). It is further
referred to the Indo-European root der, split, open (Fick, Prellwitz).

a feeble or awkward person,
Middle Irish déblén,
Early Irish dedblén,
weakling, from dedbul, weak; the opposite of
adhbhal, q.v.
(di-adbul). Stokes allows the alternate possibility of it
being from Latin dêbilis;
See dìblidh.

after, Irish a n-diaigh,
Old Irish i n-dead, post,
Early Irish
i n-diaid, from
Old Irish déad, finis, Welsh diwedd, finis, Cornish deweth,
Breton diuez, *dê-ved-on (Stokes); from the root ved, lead, as in
toiseach, q.v.
(Stokes prefers ved of
feadhainn. Also deidh,
déigh, the latter a bad form etymologically. The
Old Irish had
also the form degaid (= di-agaid), the opposite of i n-agid,
now an aghaidh, against, adversus.

says (said), inquit, Irish deirim,
Old Irish adbeir, dicit;
deir
is the root-accented fort (*ad-bérô) of
abair (the prepositional
accuented form, *ád-berô).
See abair. The
a of a deirim
belongs to the
ad-, while the d of it takes the place of
b in the root (ber).

end, so Irish,
Old Irish dered,
Old Gaelic derad (Book of Deer):
*der-vedo-n, root ved as in
déidh, q.v.? Ascoli suggests that
der is the basis, the opposite of er, front, from the proposition
air (*pare). Hence deireas, injury.

-teen, e.g., cóig-deug, fif-teen, Irish déag,
Old Irish déc,
deac, Welsh deng, ten (?). The exact relationship of
deug to
deich is difficult to decide. The other Indo-European languages, as
a rule, make 13 to 19 by combining the unit numeral
with 10, as German drei-zehn, Anglo-Saxon ðríténe, Latin tridecim.
*dvei-penge (St.).

tickle, Irish giglim,
Old Irish fogitled (for fogicled?). The Gaelic
seems borrowed from the English tickle, kittle; and possibly all
are onomatopoetic, and reshaped in later times. Cf. English
giggle, Latin cachinnus.